How severe is CVE-2018-17613?

CVE-2018-17613 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2018-17613 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-17613?

CVE-2018-17613 affects Telegram Telegram Desktop. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-17613?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2018-17613 published?

CVE-2018-17613 was published on 2018-09-28 and last updated on 2026-06-17.

CVE-2018-17613

CVE-2018-17613 is a critical-severity vulnerability in Telegram Telegram Desktop with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-522.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Telegram Telegram Desktop
Published: 2018-09-28
Last modified: 2026-06-17

Description

Telegram Desktop (aka tdesktop) 1.3.16 alpha, when "Use proxy" is enabled, sends credentials and application data in cleartext over the SOCKS5 protocol.

Frequently asked questions

What is CVE-2018-17613?: Telegram Desktop (aka tdesktop) 1.3.16 alpha, when "Use proxy" is enabled, sends credentials and application data in cleartext over the SOCKS5 protocol.
How severe is CVE-2018-17613?: CVE-2018-17613 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2018-17613 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-17613?: CVE-2018-17613 affects Telegram Telegram Desktop. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-17613?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2018-17613 published?: CVE-2018-17613 was published on 2018-09-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:telegram:telegram_desktop:1.3.16:alpha:*:*:*:*:*:*

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